My wife's AMD rig (in my sig) is using the stock cooler/fan, and every night it sounds like this thing wants to take off....

I can hear the noise through my headset when im gaming (about 10-12ft away) , and so I took a look at HWMonitor to see.

4900 rpm
45c (max temp)

I'm in the market for a 92mm or LP 120mm HSF but budget means that it needs to under £20....
I use the 212 Evo (which is what I would've bought) but it only manages to fit into my 200mm wide case with a few mm to spare. The case this cooler will be going into is only 190mm wide.

Now, the options I've short listed....

Xigmatek Loki
Alpenfohn Civetta
CM TX3 Evo
AC Freezer 13

The xigmatek is the better performer in terms of cfm and dBA, but given the Alpenfohn is £6 cheaper I could get a better 92mm fan to sort the loudness but I have no clue what... I found a Nexus 92mm PWM which combined with the Alpenfohn is still under budget. And then there is the cooler master TX3 Evo which I believe has better heat transfer..

On the bench (sitting outside my budget) is the Thermaltake True Spirit 120M, which is the low profile 120mm cooler.

Right, onto the pc usage.....
It's currently running at stock settings and being loud as hell, but with a new cooler I'd like to get at least 3.4ghz 24/7 clock and it being fairly quiet.

I am actually looking for something similar for my girlfriends Phenom II X4 960T. I will be rebuilding the rig with a better case and water cooling, but until then I need a cheap, low profile, and effective air cooler.
One thing I've found is that with the 92mm fan based coolers, push pull fans are even more important if noise is a concern, due to most fans that size being rather high speed...